September 2025 Sky Phenomena: Two Eclipses, Aurora Borealis, and Saturn Visibility
Get ready for an astronomical treat this September as the night sky offers a dazzling array of celestial events. From the Fall Equinox to a series of planetary alignments and a partial solar eclipse, there's plenty to marvel at.
On the night of Monday, September 8, 2025, the nearly full moon and golden Saturn will grace the eastern sky. The following day, the moon will take centre stage, with a thin crescent moon rising in the east on the evening of Sunday, September 7, 2025, marking the Full Corn Moon.
As we move closer to the Fall Equinox on Monday, September 22, 2025, the sun will be directly above the equator, signifying the official start of autumn. This equinox also brings a new moon, which creates the darkest skies of the month, perfect for stargazing.
The partial solar eclipse on the same day will be a spectacle for some regions, particularly in New Zealand, Fiji, Tonga, and Antarctica. For those in these regions, the moon will cover up to 86% of the sun at sunrise.
The night of the Fall Equinox also presents a unique opportunity to view Saturn at its best. At opposition, Saturn rises at sunset and sets at sunrise, shining brightly at magnitude 0.6. With a small telescope, viewers can see Saturn's rings, which will appear nearly edge-on but still noticeable.
Before dawn on Tuesday, September 16, 2025, a thin crescent moon will sit near Jupiter, with the bright twin stars Castor and Pollux also visible, forming a neat diamond shape in the sky, each about four degrees apart.
Two weeks after the equinox, from September 22 to October 5, 2025, are usually a good time to see the Northern Lights, though not guaranteed. Around the equinox, Earth's tilt makes the Northern Lights stronger. Early forecasts predict auroras on September 1-2, 2025.
Throughout September, several other celestial bodies will be visible. The Great Square of Pegasus, a well-known fall constellation, rises in the east after dark all month. The Autumn Star (Fomalhaut) is visible in the southern sky all month, only visible in autumn from mid-northern latitudes.
Lastly, the Andromeda Galaxy (M31), approximately 2.5 million light-years away, will be visible in the eastern sky after dark. From dark skies, the Andromeda Galaxy may be spotted faintly with the naked eye, while binoculars will show it as a fuzzy patch even from a city.
So, grab your telescopes and head outside to witness these stunning celestial events this September. The Vereinigung der Sternfreunde e.V., a renowned astronomy association, has published the star sky prediction for September 2025, ensuring you won't miss a thing. Happy stargazing!
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